JPS5832431Y2 - Wiring duct - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a wiring duct.

As shown in Fig. 1, a conventional wiring duct has an opening 2 on one side of a duct body 1 made of synthetic resin, and the opening is closed with a removable lid 3, which is elastically connected to the outer surface of both sides of the opening. Although the inner surface of the lid side was brought into contact with the lid, for example, when the wiring duct was used in the vertical direction, the lid's own weight acted in the longitudinal direction, resulting in the lid sliding down.

This drawback is particularly noticeable in large wiring ducts.

Various proposals have been made to solve this drawback, but each has the following drawbacks and cannot be said to be fully satisfactory.

In other words, for example, there is a method of tightening the duct body and the cover together using a commercially available electric wire binding band, but it is time-consuming to unfasten the binding band, and moreover, it is difficult to tighten the band when the duct body is fixed tightly against the wall. cannot be used.

For example, as shown in Japanese Utility Model Application No. 51-125593, a projection is provided on the inner surface of the lid, or as shown in Japanese Utility Model Application No. 51-1526
As shown in Publication No. 92, there is a device that increases the contact area by providing an abutting piece on the main body and a hanging piece on the lid, but when the duct is not clogged with wires, the width of the opening increases due to the pressing force. is reduced, so there is still a risk of slip-off.

Furthermore, as shown in Japanese Utility Model Application Publication No. 51-144798,
Some types have a lid formed with a protrusion that engages with the longitudinal groove of the duct body, but this has the drawback that the manufacturing cost is high because the cross-sectional shape of the lid is not uniform.

Furthermore, as a method for reliably fixing the duct body and the lid, a method has been proposed in which a fixing metal fitting is tightened from the inside of the lid with a screw, as shown in Japanese Utility Model Publication No. 51-48716.

The present applicant also proposed, in Utility Application No. 107789/1989, to use a material with a large coefficient of friction on the contact surface between the duct body and the lid, and obtained good results in preventing slippage. However, there is a drawback that manufacturing costs increase.

In view of the above, it is an object of the present invention to provide an improved wiring duct that increases the frictional force of the contact surface using simple manufacturing equipment and that can be opened and closed with a light force during attachment and detachment.

Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIGS. 2 and 3, the contact surfaces 13 and 14 of the duct body 11 and the lid 12 are
In the direction B perpendicular to the direction B, there are provided irregularities in which fine grooves and ridges are formed.

The size of the fine irregularities is, for example, a groove depth of about 0.2 mm, and a pitch between edges of about 0.2 mm.

An example of a method for manufacturing such unevenness is that the unevenness on the contact surface 13 on the duct body side is formed by a press at the same time when the groove 15 on the main body is punched out with a press, and the unevenness on the contact surface 14 on the lid side is
As shown in FIG. 4, the unevenness may be formed by rolling by pressing the die 16, 16 after the lid 12 is pultruded.

According to the present invention, since the duct body and the lid are respectively formed with unevenness parallel to the attachment/detachment direction, displacement in the longitudinal direction can be prevented without interfering with opening and closing of the lid.

In addition, it is easy to manufacture, and is aesthetically pleasing because the uneven portions are not visible from the outside when in use.Furthermore, it has various effects such as not reducing the volume of the wire housing portion inside the duct.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway perspective view showing a conventional example, Fig. 2 is a partially cutaway perspective view showing an embodiment of the present invention, and Fig. 3 is a perspective view showing the lid 12 of Fig. 1 in an open state. , FIG. 4 is an explanatory diagram of the manufacturing method of the present invention. 11...Duct body, 12...Opening lid, 13,1
4...Abutment surface.

Claims (1)

[Scope of utility model registration request] In a tub-shaped wiring duct which has an opening on one side of the duct body and closes the opening with a removable lid, the opening and the lid are provided on both sides of the contact surface in a direction perpendicular to the longitudinal direction of the duct. A wiring duct characterized by continuously forming minute grooves and ridges.